Shoe-sewing machine



May 29, 1923.

1,457,022 s. A. DOBYNE SHOEA SEWING MACHINE Filed Nov."15,-1918 3 sheets-sheet 1f i l-u 1| o l L SEMI@ S22-Pfff A. 005x015,

May 29, 1923.

S. A. DOBYNE sHoE SEWING MACHINE 4Filed Nov. 15; 191B 5 Sheets-Sheet 2 I og/WM. A

' 1,45 7,022 S.A.DQBYNE SHOE SEWING MACHINE Filed Nov..'15 1918 .3 sheets-*sheet :a`

5 j] l L A i 1% 1p1 I z gg /vwjf-l/ l l e; .e 136 l m wlw \v kwart/km:

'being cut away to Patented May 2.9, 1923.

UNITEDl STATESPATLENT .OFFICf/ y kSEIEIHEN'A. DoBYNE, 0E sfr. LoUIs, MISSOURI, AssIGNoH 'ro CHAMPION SHOEl MACHINERY COMPANY, soUEn or sr..I.oUIs1MIssoURI, AlcoItPo'EA'rIoN oF MIS;A

sHoEsEWING MACHINE.

Application :ned November i5, 191s. j serial No. 262,686;

To @ZZ whom #may concern: i

Be it known that I, STEPHEN A. DoBrNE,

f a citizen of the United States, and'residing at St. Louis, Missouri, have `invented the new and useful 'Improvement' in Shoe-Sewing Machines, of whichk the followingvisga speciiication. Y

This invention relates to sewing machines, and more particularly .to wax threadshoe sewing machines, adapted forthe manufacture and repair of bootsand shoes.

One of the yobjects of this linvention is to improve the heating system soasto secure sufiicient heat of the. mechanism rfor handling Vthe wax thread; f y n y Further objects willappear from the detail description taken in connectionwith the accompanying drawings, in which: i l.Figure lA is a front elevation of a .machine embodying'this invention,v the front plate n show'. the interior con"- struction; Y. Y Figure 2 1s a side elevation from p theV right side of the machine; and

' Figure 3 is a side elevation'from the left' lside of the machine'.

- Referringto the accompanying drawings,

ll designates the machine jhead, which is as usual in the form' of a casting, having an overhanging arm 2, `and attached vto this overhanging arm by screws 3 isa bracket 4, the screws 3 passing through the 'bracket 4 and being. threaded into the. arm 2. bracket section `5 isvattached to the headas shown'. at 6v.r Mounted inbearings in the head is a shaft 7 provided with a pulley 8, and fixed to the shaft area series of'cam wheels 9, l0 'and,11, provided with cam grooves on their outer and side faces, for the purpose of operating the various mechanisms. The bracket 5 is spaced from the overhanging arm 2, and the bracket 4, so as to form a table 12- for the work, and the by an arm 15 on a rock shaft 16 mounted in bearings on the head and having fixed thereto an arm 17 provided with a rcam 'in vthe bracket 5.

roll eng-aging a cam groove inthe left face igure 3) of the cam wheel 10. Theneedle bar is mountedY onv a vlaterally movable slide l18, `recip'rocated-vby a 'lever 19,interconnectedfwith" theslide and 'provided with a cam roll engaging acamgroove in` thegright' face (Figure 3) yof thefca'mf'wheel 9. -With f this constructiom'the needle is givenqa feeding movement when in the` work to1 feed thework, substantially as' shown ,fand de- 'scribed in United States Patent' No; 7 60,7 32;

The shuttle is `mounted within the head-5 and may 'be' constructed as Patent No. 760,732 referred to. f

LThe loopv takefo' and the spreader'fnot shown) which may bel of the construction shown the y shown in Patent No. 760,732 are 'mounted v mechanism mounted on the head Both `are `operated by o,

The awlbar 33 carrying an jawl 34,1 and i having a jcrosshead. 35 is guided in `the 'bracket 4 and carries a block'37 lengaggging aV fork 38 on an arm 39 tfixed to a 'rock shaft 22, and having an arm .40 provided with a cam'roll 'engaginga cam groovein the left'face, Figure 3', of the cam wheel9.

The presser`-foot4l is mounted on 'a bar y42, carrying a cross head'43 movable along' a/guide 44, fand pressed'downwardlyl by a l leaf-spring 45 pivoted at46 on the bracket 47, having a vyoke 48 provided with a screw 49 bearing on lthe leaf-:spring to tensionthe same. In order to raise the' presser-foot manually, pivoted at 50 on" the "machine head, is an arm ,51, the toe '52 of which'envgagesan `adjustable screwk 53v on the cross head` 43,; The arm llnis' provided `withl an,v aperture 544 adapted to receive a'rod'or wire leading to a treadle (not shown).

The presser-foot maybe operated substantially asshown in Patent No. 760,732.

The looper may be constructed and oper ated as shown in Patent No. 7 60,7 32. p

Thel thread cop 83 is mounted on the ma- .chine head, and the thread passes between' pairs of thread tensioning discs 85 to the wax-pot 86. The thread passes from the wax-pot through an apertured lug 9,6 through an eye in the outer endiof an auxiliary take-up lever 97, which is acted upon yby a spring 98. From thisau-Xiliarytakeup lever, the thread passes through trucks on a pair of'take-up arms 100 and 101. The

take-up arm isxed to the rock shaft 102 v and this take-up arm is also connected by a link 103 to the arm 104 on the take-up arm 101, thereby these take-up arms will be operated in unison. A s n The heat is in this particular embodiment supplied by gas, the main gas pipe being shown at 120 (Figure 3) and this gas pipe is jointed to a chest or distributor 121 from which lead pipes 122, 123, 124 and 125, these pipes being respectively controlled by valves 126, 127, 128 and 129. The pipe 122 leads to and opens adjacent theWaX-pot 86, this Wax-pot being 'spaced from the side face of the, machineL head,and the pipe 122 opening at130 thereby providing a combustion space for the flame. The-piper123 opens at 135 opposite a flange or extension 132 on the take-up'lever 101 and this flange is also spaced fromA the side face of the machine head so as to furnish a combustion space. 'Similarly,the pipe 124 opens at 133 contiguousa flange or ear 134 on the take-up lever 100,'vhich flange orear is spaced from the side face of the machine headL solas to furnish a combustion`v space fory the flame. The Iflanges or ears 132 and 134 are provided io furnish *heating surfaces impinged upon by the llames from the openings 135 vand 133. Therpipe 125 opens at 131 underneath the shield or' hood 136 so as to direct the heatto the shuttle mechanism. j

It will` thereforel` be seen that with this construction the heatingl system distributes the gas to the different parts of the devices which handle the Wax thread, and that the distribution of the gas may be` accurately controlledj by the manipulation ofthe valves. Itvvill, of course, be understood that these valves are ordinaryneedle valves which control the passage of the gas from the chest 121 to the different pipes, and in o-rder to keep these valves in any desired position of adjustment, each vvalve has a spring 13T arranged between its head and the cap 13S onthe steam chest. y

j It is not necessary to describe in detail the sequence j in operation of the several parts, since the general Asequence in operation is substantially the same as in the pat-- ent referred to, to which reference is had. In the general operation, the elements perform their respective functions in the same manner and in the same sequence as in the patent referred to, although in details of construction and in details of operation, some of the mechanisms are different, and

improved from the corresponding mechaing a frame and thread handling devicesthereon, a heating system, comprising', heating jets for said devices, a gas chest accessibly locatedV on said frame Iand having a gas connection, gas pipes leading from said chest to said several jets, and valves on said Y chestk adapted to independently control at the chest the admission of gas from said 'c'hestto said pipes. y

2. In a wax thread sewing inachinejhaving a base, and thread handling devices thereon, alheating` system, comprising, heating` jets for and adjacent said devices, a gas chest arranged along said baseand `havingV a gas connection, gas pipes leading from said chestto said jets, and valves onisaid chest adapted to independently control .at the-chest the admission of ygas from said chest to said pipes. j Y l In va` Waxy thread, sewing machine, a moving` take-up element having an eXtension adaptedV to` provide a flame receiver, and a stationary burner, adapted to direct a fiame on said extension throughout its movement, in orderto heat said take-up;

1n testimony whereof I affix my signature j j this 25th day of May, 1918. y

"STEPHEN Af Do'BvNn.,Y 

